update-manager: terminal-based version

[David Hedlund]

I expect that there are some useful terminal packages or script that are 
performing the same thing as the update-manager GUI. If you are aware of 
any such solution, please give me the name of the software.


If not, then it would be useful to make a clone of update-manager that 
could be either part of, or packaged, for Ubuntu. Just to try it out, I 
wrote a bash script (just execute it, and run the alias `u` to try it), 
see the attached file. However, I'm not satisfied with it, because it's 
not yet a full-feathered /clone/ of update-manager:


  Which commands are executed when:

* update-manager is opened:

     * I'm confident that this is the first executed command: sudo 
apt-get -y update

     * Then packages are listed, exactly which command is executed to 
figure this out?

* The "Install Now" button is clicked on. Examples, which of these 
commands are executed, and in which order (please quote with source code 
and file names as references)?:

apt-get upgrade

apt-get dist-upgrade

apt autoremove

apt clean

apt full-upgrade

Is something else executed?


* /var/run/reboot-required is used to determine if the GUI should 
display a button used to restart the distro

UpdateManager.py[1]

----------->8--------------

# file that signals if we need to reboot
REBOOT_REQUIRED_FILE = "/var/run/reboot-required"

----------->8--------------

1: git clone git://git.launchpad.net/ubuntu/+source/update-manager && 
grep -r "reboot-required" .

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#!/bin/bash

# Copyright 2023 David Hedlund
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

tee ~/.bash_aliases > /dev/null << 'EOF'
debian_family__check_if_reboot_is_required() {

debian_family__check_if_reboot_is_required__command="reboot";

    if [ -f /var/run/reboot-required ]; then

	cat /var/run/reboot-required

	while true; do

	    read -p "Execute \`$debian_family__check_if_reboot_is_required__command\` (y/n)?:  " yn
	    case $yn in
		[Yy]* )

		    $debian_family__check_if_reboot_is_required__command

		    ;;
		[Nn]* )

		    break

		    ;;
		* )

		    echo "Please answer yes (y) or no (n)."

		    ;;
	    esac

	done

    fi
}
EOF

echo "alias u='sudo apt-get -y update && sudo apt-get -y dist-upgrade && sudo apt -y autoremove && sudo apt clean && debian_family__check_if_reboot_is_required'" >> ~/.bash_aliases

source ~/.bash_aliases